import tweepy #https://github.com/tweepy/tweepy
import csv
import argparse
 
#Twitter API credentials
consumer_key = "KU8y0jCijZYTZKD1JNXxyuCe4"
consumer_secret = "IRdkpvddpsXS9QF5AMnrdMx9CN0Mqc0O52zFu1iXTE723F1fgt"
access_key = "1346256042-7aJMv5FlYas6ue27nKxFEi8PRNExDGSAFODJd20"
access_secret = "gEplKhvd07i5eEJX51osZhLyX4KnDiFqyCUc3UQAnR0lI"
 
def get_all_tweets(screen_name):
    #Twitter only allows access to a users most recent 3240 tweets with this method
    
    #authorize twitter, initialize tweepy
    auth = tweepy.OAuthHandler(consumer_key, consumer_secret)
    auth.set_access_token(access_key, access_secret)
    api = tweepy.API(auth)

    #initialize a list to hold all the tweepy Tweets
    alltweets = []  
    
    #make initial request for most recent tweets (200 is the maximum allowed count)
    new_tweets = api.user_timeline(screen_name = screen_name,count=200)
    
    #save most recent tweets
    alltweets.extend(new_tweets)
    
    #save the id of the oldest tweet less one
    oldest = alltweets[-1].id - 1
    
    #keep grabbing tweets until there are no tweets left to grab
    while len(new_tweets) > 0:#len(alltweets) < 100: 
        print ( "getting tweets before %s" % (oldest) )
        
        #all subsiquent requests use the max_id param to prevent duplicates
        new_tweets = api.user_timeline(screen_name = screen_name,count=200,max_id=oldest)
        
        #save most recent tweets
        alltweets.extend(new_tweets)
        
        #update the id of the oldest tweet less one
        oldest = alltweets[-1].id - 1
        
        print ( "...%s tweets downloaded so far" % (len(alltweets)) )
    
    #transform the tweepy tweets into a 2D array that will populate the csv 
    outtweets = [[tweet.id_str, tweet.created_at, tweet.text.encode("utf-8")] for tweet in alltweets]
    
    #write the csv  
    with open('%s_tweets.csv' % screen_name, 'w') as f:
        writer = csv.writer(f)
        writer.writerow(["id","created_at","text"])
        writer.writerows(outtweets)


if __name__ == '__main__':
	#pass in the username of the account you want to download
        parser = argparse.ArgumentParser(description='Get All Tweets From User')
        parser.add_argument("user", metavar="USER", type=str, help="Downloads tweets for USER")   
        arg = parser.parse_args()
        get_all_tweets(arg.user)
